Don't let GTA 2 decieve you and put your money into waste. Honestly, it's the most disappointing game played by me.
The graphics have improved a tad bit from the original Grand Theft Auto 1. But when you compare the extensive universe of Liberty City the city in GTA 2(UNKNOWN TOO!!!) has a huge difference.
The only thing I liked about GTA 2 was it's excellent soundtrack which I think is even better than Vice City.
However if you already own GTA 3 and Vice City don't let GTA 2 decieve you and put your money into waste.